text: from .save_load import save_classifier, load_classifier
  from .metric import *
  from .target_encode import j_decode, j_encode, j_renorm
  from .cross import train_predictor, cross_validation
  from ..preprocess import prepare_data
  from .inverse import sp_solve as solver
  
  # from .inverse import sp_solve as main_solver
  # import numpy as np
  #
  # def solver(a, b):
  #     try:
  #         return main_solver(a=a, b=b)
  #     except np.linalg.LinAlgError:
  #         return np.linalg.solve(a=a, b=b)
  